Machine eor buniwg coal



UNTED STATES lAlElXl FFICEE.4

ELISHA. SIMKINS', OF ALLEGHENY, PENNSYLVANIA.

.;f' MACHINE FOR MINING COAL.

Specicatt-ion of Letters Patent No. 21,908, dated October 26, 1858.

To all whom it may @encarar Be it known that I, Enlsna SIMKINS, of thecity and county of Allegheny, in the State of Pennsylvania, haveinvented a new and Improved Machine for Mining Coal; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings and to the letters ofreference marked thereon, similar letters referring to similar parts.

The nature of my invention consists in a mechanical arrangement foroperating picks in such manner as will give them a back, forward, sideand angular motion,

To enable others skilled in the art to make and use my invention, I willproceed to describe its. construction and operation.

In the accompanying drawings; Figure l, is a perspective view ofthemining machine. Fig. 2, is an end view. Fig. 3, is a top view.

(a.) is the stationary frame.

() are the pedestals of frame (a),

(c) is a double or compound slide which can be moved to the right andleft and is held up and supported on the frame (a), by means of ribs Theframe or slide (d) and the top frame are united to each other by fourcolumns (e) and both the frames and are held up and move back andforward in the double or compound slide To the frame (a) is attached thescrew (u) and also the bearings or journal boxes of shaft (2) on the endof the screw (u) is attached a ratchet wheel (p), a double ratchet pawl(which consists of a plate furnished with a spiral spring (9) stud (E)and trigger (Q)) is also placed on screw (u) and is moved and operatedby lever (e) which is attached to shaft (2) on which is placed a part ofa wheel marked (01) which moves on shaft (2) and is held in its properposition by means of a groove in the shaft and a tongue in the hub ofthe wheel, and is moved back and forward on the shaft by the piecemarked (8) which is attached to the double or compound slide (c). Thewheel (o1) is operated by the slide-rack (it) which is operated by thecam (1) on the shaft (l) which rests on the plumber-blocks (5) and isheld toits place by the caps (6); the shaft (l) is also furnished with abevel wheel and driving wheel The crank (al) has its journal bearings inthe sliding frame (d) and top frame (f) and is furnished with a bevelwheel (vv) which gears into the bevel wheel (w) to the crank (al) isattached a flexible connecting rod (r1) which consists of a rod (r1),cylinder (a), nuts (o) and spiral spring (ll) arranged as represented inFigs. l and 3, the flexible rod (r1) with parts is attached to andoscillates between the arms (m) ofv shaft (8); the lower end of shaftrests and moves in the piece marked (m1). which is secured to or cast onthe sliding frame (d).

The upper end of the shaft is held by and moves in the journal box (a)which is secured to the top frame (f); to the shaft (3) is attached thearms (71:) and to arms are attached the pick receivers (Z) which areheld in their proper position by the connecting rod The picks g) aremade so as to be removed and be replaced by others at pleasure.

The ratchet wheel (p1) see Fig. 2 is attached to the end of the screw(t) which is secured to the sliding frame (d) the double pawl (B1) isalso placed on the end of the screw (t) and is moved and operated by thecompound lever (that is a lever of two or more parts) the fulcrum ofwhich is attached to the top frame f) the lever (y) is operated by theslide-rack (It). The screw (t)Y which is secured to the sliding frame(el) is operated by the ratchet wheel (771) and ratchet pawl (B1) andthe screw (a) which is secured to the stationary frame (fr) is operatedby the ratchet wheel and ratchet pawl (B) which is operated by the lever(2); and both the screws (t) and (u) are revolved in the double orcompound nut (s) the screw (t) moves the sliding frame (d) back andforward, and the screw (u) moves the double or compound slide (c)sidewise to the right or left and both the sliding frame (d) and thedouble or compound slide (c) move in accordance with the motion given tothe screws (t and u).

The angular motion of the picks is obtained by means of the lever (10)which is connected with the connecting rod and by simply raising orlowering the lever (l0) any desired angle of the picks may be obtained.The slide-rack (It) at one end moves or slides in a hanger marked (t1)(see Fig. 2,) and the other end is secured to the shaft (3) and the backand forward movements of the slide-rack (7L) will throw the upper end ofshaft (3) back and forward in its journal box (4). This back and Olwardmotion of shaft will cause t-he picks (g) to cut an opening suihcientlylarge to clear themselves and thereby prevent them from becoming wedgedin the opening which they make. The arrangement of the flexibleconnecting rod (r1) as connected with the crank (nl) and shaft l(3) issuch Jthat it yields, and as the shaft.- gives motion to the picks, andas the shaft is constantly changing its position, and asy the picks willnot at all times enter the coal to the same depth itbecomes necessaryfor the connecting rod to yield in order that the crank (nl) may passits center. The size of the .machine and its various parts, I leave tothe good udgment of the mechanic, but the general arrangement and formof the machine and its parts should in all cases correspond with theform and arrangement described and represented in the drawings andspecifications.

The operation of my invention is as fcl lows: By turning the wheel itwill revolve the shaft (l) which will revolve the bevel wheel (w) whichwill' revolve the bevel wheel (o) and crank (nl) which in connectionwith the connecting rod (r1) will give the shaft (3) a rocking motionand thereby give to the picks their motion. The slidingmack (71,) ismoved back and forward by the cam ('v) thereby giving to the upper endof shaft (3) a back and forward motion,

' and also operates the wheel (01), levers (e) and. (y) which willoperate the ratchet pawls (B1 and B) which revolve the ratchet wheels(p1 and p) which give motion to the screws (t and u) which operate theslide frame (d) and the compound or doublel slide (c) by means of whichthe side, back and forward motion of the machine is obtained.A Thedesired mot-ion of the screws (t) and u) is obtained by simply changingthe position of the trigger (g) of the ratchet pawls, thetrigger beingheld in proper position by means of the spiral spring and the stud (E);and the desired motion or angle of the picks is obtained by simplyraising or lowering the lever (10).

Having thus described the construction and operation of my invention,what I claim as of my invention and desire to secure by Letters Patentof the United States is#- 1. The arrangement of the double or com` poundslide and sliding frame (d) when used in connection with the stationaryframe (a) and operated by the screws and (u) and the nut (s) as hereindescribed and for A the purpose set forth.

2. The arrangement of the cam (fr), sliderack (7L), wheel (01) shaft(2), shifting piece (8), levers (s) and (y), ratchet wheels (7,91) and(p), and the ratchet pawls (B1) and (B), for the purpose of moving theupper end of shaft (3) back and forward and for operating the screws (t)and (u.) as herein described and set forth.

3. The arrangement of lever (l0) and the connecting rod for the purposeof regulating the angle of the picks (g) as herein described and as setforth.

4. The arrangement of the flexible connecting rod (r), the crank (al)the shaft (3), the arms (la), the pick receivers (t) and the picks (g),as herein described and for the purpose specified.

ELISHA SIMKINS.

)Vitnesses G. l?. Srnoii, ALEANDER HAYS.

